Best Liquid Weed and Feed for St. Augustine Grass
Feed your lawn and kill weeds in one easy step. Discover the top-rated liquid weed and feed products specially formulated for St. Augustine grass.
Let Gardening Philosophy: A lush, weed-free St. Augustine lawn starts with the right care. Liquid weed and feed combines fertilization and weed control in a single application, saving you time while delivering nutrients directly to the roots. Our expert guide helps you choose the best product for your lawn's needs.
Why Choose Liquid Weed and Feed for St. Augustine?
St. Augustine grass is a warm-season turf that thrives in southern climates. However, it's susceptible to weeds like crabgrass, dandelions, and clover. Liquid weed and feed offers several advantages:
- Dual Action: Feeds your lawn while killing broadleaf weeds and grassy weeds.
- Fast Absorption: Liquid formulas are absorbed quickly through leaves and roots for rapid results.
- Even Coverage: Spray-on application ensures uniform distribution, avoiding missed spots.
- Reduced Runoff: Compared to granular products, liquids are less likely to wash away.
For best results, apply during the active growing season (spring to early fall) when temperatures are between 65°F and 85°F. Always follow label instructions to avoid damaging your lawn.
Top Liquid Weed and Feed Products for St. Augustine
We've analyzed the market to bring you the most effective liquid weed and feed solutions. Each product is selected for its compatibility with St. Augustine grass and proven performance.
Southern Ag Lawn Weed Killer with Trimec
$24.95
Broad-spectrum weed control for St. Augustine. Kills over 200 weed species without harming grass.
Check PriceFertilome Weed-Out Lawn Weed Killer
$18.50
Fast-acting liquid formula. Safe for St. Augustine when used as directed. Kills dandelions, clover, and more.
Check PriceBioAdvanced Southern Weed & Feed
$32.99
2-in-1 liquid fertilizer and weed killer. Specially formulated for southern lawns including St. Augustine.
Check PriceScotts Turf Builder Southern Triple Action
$28.97
Kills weeds, prevents crabgrass, and feeds your lawn. A great all-in-one solution for St. Augustine.
Check PriceHow to Choose the Best Liquid Weed and Feed
Selecting the right product for your St. Augustine lawn depends on several factors:
- Weed Type: Identify the weeds you're dealing with. Broadleaf weeds (dandelions, clover) require different active ingredients than grassy weeds (crabgrass).
- Fertilizer Ratio: Look for a balanced N-P-K ratio (e.g., 16-4-8) that supports St. Augustine's growth without promoting excessive top growth.
- Application Method: Liquid formulas are applied with a sprayer. Ensure you have the right equipment for even coverage.
- Weather Conditions: Apply on a calm day with temperatures below 90°F to prevent burning.
For more lawn care insights, explore our Lawn Care guides and best weed killer recommendations.
Application Tips for Best Results
Follow these expert tips to get the most out of your liquid weed and feed application:
- Timing: Apply in early spring when weeds are actively growing and St. Augustine is coming out of dormancy.
- Mowing: Mow your lawn 2-3 days before application, and wait 2-3 days after before mowing again.
- Watering: Water lightly after application to help the product penetrate the soil.
- Safety: Keep children and pets off the lawn until the product has dried completely.
For more on lawn maintenance, check out our lawn fertilizing tips and weed control strategies.
Frequently Asked Questions
Can I use liquid weed and feed on newly seeded St. Augustine?
It's best to wait until the grass is well-established (at least 6-8 weeks) before applying any weed and feed product.
How often should I apply liquid weed and feed?
Typically, 2-3 applications per growing season are sufficient. Follow the product's specific instructions.
Will it harm my St. Augustine grass?
When used as directed, liquid weed and feed is safe for St. Augustine. Avoid applying during heat stress or drought conditions.
Can I use this on other grass types?
Some products are formulated for southern grasses; always check the label to ensure compatibility with your grass type.
Ready to give your St. Augustine lawn the best care? Explore our recommended products below and enjoy a weed-free, vibrant lawn.
